Electronic cigarette



FIG. 1 is a front view of an electronic cigarette showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines depict portions of the electronic cigarette that form no part of the claimed design. 

CLAIM The ornamental design for an electronic cigarette, as shown and described. 